211220010212 has 24 divisors (see below), whose sum is σ = 382399079160. Its totient is φ = 101963473920.

The previous prime is 211220010193. The next prime is 211220010229. The reversal of 211220010212 is 212010022112.

It can be written as a sum of positive squares in 4 ways, for example, as 89219300416 + 122000709796 = 298696^2 + 349286^2 .

It is a super-2 number, since 2×211220010212² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4421012 + ... + 4468532.

It is an arithmetic number, because the mean of its divisors is an integer number (15933294965).

Almost surely, 2^211220010212 is an apocalyptic number.

It is an amenable number.

211220010212 is a deficient number, since it is larger than the sum of its proper divisors (171179068948).

211220010212 is a wasteful number, since it uses less digits than its factorization.

211220010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85871 (or 85869 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211220010212 its reverse (212010022112), we get a palindrome (423230032324).

The spelling of 211220010212 in words is "two hundred eleven billion, two hundred twenty million, ten thousand, two hundred twelve".